package com.atguigu.gulimall.product.service.impl;

import com.atguigu.gulimall.product.entity.SkuImagesEntity;
import com.atguigu.gulimall.product.entity.SpuInfoDescEntity;
import com.atguigu.gulimall.product.service.*;
import com.atguigu.gulimall.product.vo.SkuItemSaleAttrVo;
import com.atguigu.gulimall.product.vo.SkuItemVo;
import com.atguigu.gulimall.product.vo.SpuItemAttrGroupVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ThreadPoolExecutor;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.SkuInfoDao;
import com.atguigu.gulimall.product.entity.SkuInfoEntity;
import org.springframework.util.StringUtils;

import static java.awt.SystemColor.info;

@Service("skuInfoService")
public class SkuInfoServiceImpl extends ServiceImpl<SkuInfoDao, SkuInfoEntity> implements SkuInfoService {

    @Autowired
    SkuImagesService imagesService;

    @Autowired
    SpuInfoDescService spuInfoDescService;

    @Autowired
    AttrGroupService attrGroupService;

    @Autowired
    SkuSaleAttrValueService skuSaleAttrValueService;

    @Autowired
    ThreadPoolExecutor executor;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                new QueryWrapper<SkuInfoEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public void saveSkuInfo(SkuInfoEntity skuInfoEntity) {
        this.baseMapper.insert(skuInfoEntity);
    }

    /**
     * Sku界面，按条件查询
     *
     * @param params
     * @return
     */
    @Override
    public PageUtils queryPageByCondition(Map<String, Object> params) {
        QueryWrapper<SkuInfoEntity> queryWrapper = new QueryWrapper<>();
        /**
         * key:
         * catelogId: 0
         * brandId: 0
         * min: 0
         * max: 0
         */
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            queryWrapper.and((wrapper) -> {
                wrapper.eq("sku_id", key).or().like("sku_name", key);
            });
        }

        String catelogId = (String) params.get("catelogId");
        //分类不选的话传过来0
        if (!StringUtils.isEmpty(catelogId) && !"0".equalsIgnoreCase(catelogId)) {
            queryWrapper.eq("catalog_id", catelogId);
        }

        String brandId = (String) params.get("brandId");
        //品牌不选的话传过来0
        if (!StringUtils.isEmpty(brandId) && !"0".equalsIgnoreCase(catelogId)) {
            queryWrapper.eq("brand_id", brandId);
        }

        String min = (String) params.get("min");
        if (!StringUtils.isEmpty(min)) {
            //gt是大于，ge是大于等于
            queryWrapper.ge("price", min);
        }

        String max = (String) params.get("max");
        if (!StringUtils.isEmpty(max)) {
            //金额有可能输入的格式不对，所以要捕获异常
            try {
                //传过来的金额是String类型的，要转换成BigDecimal
                BigDecimal bigDecimal = new BigDecimal(max);
                //区间金额，最大金额必须大于0
                if (bigDecimal.compareTo(new BigDecimal("0")) == 1) {
                    //lt是小于，le是小于等于
                    queryWrapper.le("price", max);
                }
            } catch (Exception e) {
                System.out.println("传过来的金额是胡乱填的，不符合格式规范！");
            }
        }

        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                queryWrapper
        );

        return new PageUtils(page);
    }

    /**
     * 通过spuId查询Sku列表
     *
     * @param spuId
     * @return
     */
    @Override
    public List<SkuInfoEntity> getSkusBySpuId(Long spuId) {
        List<SkuInfoEntity> list = this.list(new QueryWrapper<SkuInfoEntity>().eq("spu_id", spuId));
        return list;
    }

    /**
     * 商品详情页数据
     * @param skuId
     * @return
     */
//    @Override
//    public SkuItemVo item(Long skuId) {
//        SkuItemVo skuItemVo = new SkuItemVo();
//
//        //1、sku基本信息获取  pms_sku_info
//        SkuInfoEntity info = this.getById(skuId);
//        skuItemVo.setInfo(info);
//
//        Long catalogId = info.getCatalogId();
//        Long spuId = info.getSpuId();
//
//        //2、sku的图片信息    pms_sku_images
//        List<SkuImagesEntity> images = imagesService.getImagesBySkuId(skuId);
//        skuItemVo.setImages(images);
//
//        //3、获取spu的销售属性组合。
//        List<SkuItemSaleAttrVo> saleAttrVos = skuSaleAttrValueService.getSaleAttrsBySpuId(spuId);
//        skuItemVo.setSaleAttr(saleAttrVos);
//
//        //4、获取spu的介绍    pms_spu_info_desc
//        SpuInfoDescEntity spuInfoDescEntity = spuInfoDescService.getById(spuId);
//        skuItemVo.setDesc(spuInfoDescEntity);
//
//        //5、获取spu的规格参数信息
//        List<SpuItemAttrGroupVo> attrGroupVos = attrGroupService.getAttrGroupWithAttrsBySpuId(spuId,catalogId);
//        skuItemVo.setGroupAttrs(attrGroupVos);
//
//        return skuItemVo;
//    }

    /**
     * 商品详情页数据-异步编排
     *
     * @param skuId
     * @return
     */
    @Override
    public SkuItemVo item(Long skuId) throws ExecutionException, InterruptedException {
        SkuItemVo skuItemVo = new SkuItemVo();

        CompletableFuture<SkuInfoEntity> infoFuture = CompletableFuture.supplyAsync(() -> {
            //1、sku基本信息获取  pms_sku_info
            SkuInfoEntity info = this.getById(skuId);
            skuItemVo.setInfo(info);
            return info;
        }, executor);

        CompletableFuture<Void> saleAttrFuture = infoFuture.thenAcceptAsync((res) -> {
            //3、获取spu的销售属性组合。
            List<SkuItemSaleAttrVo> saleAttrVos = skuSaleAttrValueService.getSaleAttrsBySpuId(res.getSpuId());
            skuItemVo.setSaleAttr(saleAttrVos);
        }, executor);

        CompletableFuture<Void> descFuture = infoFuture.thenAcceptAsync(res -> {
            //4、获取spu的介绍    pms_spu_info_desc
            SpuInfoDescEntity spuInfoDescEntity = spuInfoDescService.getById(res.getSpuId());
            skuItemVo.setDesc(spuInfoDescEntity);
        }, executor);

        CompletableFuture<Void> baseAttrFuture = infoFuture.thenAcceptAsync(res -> {
            //5、获取spu的规格参数信息
            List<SpuItemAttrGroupVo> attrGroupVos = attrGroupService.getAttrGroupWithAttrsBySpuId(res.getSpuId(), res.getCatalogId());
            skuItemVo.setGroupAttrs(attrGroupVos);
        }, executor);

        //2、sku的图片信息    pms_sku_images
        CompletableFuture<Void> imageFuture = CompletableFuture.runAsync(() -> {
            List<SkuImagesEntity> images = imagesService.getImagesBySkuId(skuId);
            skuItemVo.setImages(images);
        }, executor);

        //等到所有任务都完成
        CompletableFuture.allOf(saleAttrFuture, descFuture, baseAttrFuture, imageFuture).get();

        return skuItemVo;
    }

}